Negative effects of long-term moderate salinity and short-term drought stress on the photosynthetic performance of Hybrid Pennisetum

Li, Peidong; Zhu, Yong; Song, Xiliang; Song, Fupeng

doi:10.1016/j.plaphy.2020.06.033

Cited by 60 publications

(44 citation statements)

References 87 publications

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“…6), the effect of salinity on photosynthetic light use efficiency of light-adapted leaves are possibly influenced by light quality under which they were grown. Li et al (2020) reported hybrid Pennisetum grown under NaCl salinity condition had lower Chl a/b ratios compared with those grown without NaCl. Rabhi et al (2012) found that the Chl a/b ratio was slightly modified by salinity and, in both S. portulacastrum and T. indicia only at 400 mM NaCl; it was found that Chl a/b ratio increased in S. portulacastrum and decreased in T. indica.…”

Section: Photosynthetic Light Use Efficiency and Photosynthetic Pigmentsmentioning

confidence: 83%

LED spectral quality and NaCl salinity interact to affect growth, photosynthesis and phytochemical production of

Koh

Qin

2021

Funct. Plant Biol.

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The edible halophyte Mesembryanthemum crystallinum L. was grown at different NaCl salinities under different combined red and blue light-emitting diode (LED) light treatments. High salinity (500 mM NaCl) decreased biomass, leaf growth, and leaf water content. Interactions between LED ratio and salinity were detected for shoot biomass and leaf growth. All plants had F v /F m ratios close to 0.8 in dark-adapted leaves, suggesting that they were all healthy with similar maximal efficiency of PSII photochemistry. However, measured under the actinic light near or above the growth light, the electron transport rate (ETR) and photochemical quenching (qP) of M. crystallinum grown at 100 and 250 mM NaCl were higher than at 500 mM NaCl. Grown under red/blue LED ratios of 0.9, M. crystallinum had higher ETR and qP across all salinities indicating higher light energy utilisation. Crassulacean acid metabolism (CAM) was induced in M. crystallinum grown at 500 mM NaCl. CAM-induced leaves had much higher nonphotochemical quenching (NPQ), suggesting that NPQ can be used to estimate CAM induction. M. crystallinum grown at 250 and 500 mM NaCl had higher total chlorophyll and carotenoids contents than at 100 mM NaCl. Proline, total soluble sugar, ascorbic acid, and total phenolic compounds were higher in plants at 250 and 500 mM NaCl compared with those at 100 mM NaCl. An interaction between LED ratio and salinity was detected for proline content. Findings of this study suggest that both salinity and light quality affect productivity, photosynthetic light use efficiency, and proline accumulation of M. crystallinum.

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Section: Photosynthetic Light Use Efficiency and Photosynthetic Pigmentsmentioning

confidence: 83%

LED spectral quality and NaCl salinity interact to affect growth, photosynthesis and phytochemical production of

Koh

Qin

2021

Funct. Plant Biol.

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“…In this study, we found that high amount of NaCl in the soil reduced the plants survival rate, its growth and biomass, but water deficient stress treatments did not affect plant growth and yield (Figures 1 and 2). This is because salinity stress affects halophytes considerably more than water‐deficient conditions or the combined effect of salinity and drought stress (Goharrizi et al, 2020; Li et al, 2020; Trabelsi et al, 2019). These findings are in agreement with findings from Tsamaidi et al (2017) in Anethum graveolens and Miranda‐Apodaca et al (2018) in Chenopodium quinoa .…”

Section: Discussionmentioning

confidence: 99%

Negative impact of long‐term exposure of salinity and drought stress on native Tetraena mandavillei L.

Alam

Khattak

Ksiksi

et al. 2020

Physiologia Plantarum

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Tetraena mandavillei L. is a perennial shrub native to the Middle Eastern countries of Asia, which is extensively regarded as a drought-tolerant plant. However, the plant reduces growth and biomass when grown in high concentrations of sodium chloride in the soil. We conducted a pot experiment to influence the negative impact of different levels of salinity (0, 10, and 20 dSm −1 ) and drought stress (100, 80, 60, and 40% water field capacity), to study different growth-related parameters, physiological alterations and ion uptake by T. mandavillei. Both salinity and drought stress caused a negative impact by affecting several attributes of T. mandavillei, but the plants showed some resistance against drought stress conditions in terms of growth and biomass. In addition to that, we noticed that a combinatorial and individual impact of drought and salinity stress decreased photosynthetic pigments and gas exchange parameters in T. mandavillei. Results also depicted that the combination of the abiotic stress conditions drought and salinity induced reactive oxygen species (ROS), indicating that the plants undergo oxidative damaged.

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“…In salt-sensitive plants, salt stress often leads to the decrease in chlorophyll which is the most important pigment related to photosynthesis. According to Li et al, long-term moderate salinity, short-term drought, and the combination of these stressors decreased leaf pigment content by 11.4-31.5% in leaves of hybrid Pennisetum [13]. Similarly, in pepper [14], soybean [15], and rice [16], chlorophyll content was decreased after salt stress.…”

Section: Inhibition Of Photosynthesismentioning

confidence: 99%

A Review on Plant Responses to Salt Stress and Their Mechanisms of Salt Resistance

et al. 2021

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Nowadays, crop insufficiency resulting from soil salinization is threatening the world. On the basis that soil salinization has become a worldwide problem, studying the mechanisms of plant salt tolerance is of great theoretical and practical significance to improve crop yield, to cultivate new salt-tolerant varieties, and to make full use of saline land. Based on previous studies, this paper reviews the damage of salt stress to plants, including suppression of photosynthesis, disturbance of ion homeostasis, and membrane peroxidation. We have also summarized the physiological mechanisms of salt tolerance, including reactive oxygen species (ROS) scavenging and osmotic adjustment. Four main stress-related signaling pathways, salt overly sensitive (SOS) pathway, calcium-dependent protein kinase (CDPK) pathway, mitogen-activated protein kinase (MAPKs) pathway, and abscisic acid (ABA) pathway, are included. We have also enumerated some salt stress-responsive genes that correspond to physiological mechanisms. In the end, we have outlined the present approaches and techniques to improve salt tolerance of plants. All in all, we reviewed those aspects above, in the hope of providing valuable background knowledge for the future cultivation of agricultural and forestry plants.

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Negative effects of long-term moderate salinity and short-term drought stress on the photosynthetic performance of Hybrid Pennisetum

Cited by 60 publications

References 87 publications

LED spectral quality and NaCl salinity interact to affect growth, photosynthesis and phytochemical production of

LED spectral quality and NaCl salinity interact to affect growth, photosynthesis and phytochemical production of

Negative impact of long‐term exposure of salinity and drought stress on native Tetraena mandavillei L.

A Review on Plant Responses to Salt Stress and Their Mechanisms of Salt Resistance

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